William mathbws



(lNo Model.) I

. W.. MATHEWS.

4 CLUTCH. No. 302,012. Patented-July 15, 1884.

NITED STATES PATENT OFFICE.

WILLIAM MATHnWs, on sAN Josn, CALIFORNIA, A'ssiefNon on ONE-HALF rroJOHN I. BURNHAM, on-sAMn rLAon.

CLUTCH.

SPECIFICATION forming part of Letters Patent No. 302,012, dated July 15,1884.

Application led April 26, 1884. (No model.) i

To @ZZ whom, t 1v1/ty concern.: Be it known that I, WILLIAM MA'rHnWs, of

the Kingdom of Great Britain, residing at San J os, in the county ofSanta Clara and State of California, have invented.- certain new anduseful Improvements in Clutches, of which the following is aspecification, reference being had therein to the accompanyiiigdrawings.

This invention pertains to improvements in frictional clutches, whichareiapplicable particularly to treadle-poweroperated mechanism orcontrivances, and it has for its object to transmit motion or power byfriction; and the invention consists of the combination of parts and.their construction, substantially as hereinafter fully set forth, andpointed out in the claims.

' In the accompanying drawings, Figure 1 is a sectional view, partly inside view, of my invention. Fig. 2 is a section taken on the line X X ofFig. l.

` In carrying out my invention I employ a cylindric casing, A, which isprovided at its center with a sleeve fitted upon the drivingshaft B ofthe vehicle or contrivance it is designed to drive or revolve-as, forinstance` a velocipede, bicycle, or other analogous vehicles, or anytreadle-poweroperated contrivance or mechanism. Shrunk, keyed, orotherwise also secured upon said shaft is a collar, O, which, togetherwith the plate I, also fitted upon said shaft against said collar andbolted to the outer face edge of said casing, is adapted to hold saidcasing upon the shaft so as to permit said casing to revolve thereon.Balland-socket or knuckle jointed or` pivoted to the collar C are twolevers, D, one being disposed slightly below and the other slightlyabove a horizontal plane passingr centrally 4o through the shaft B, toenable the shoes E, piv- /oted or ball-and-socket-jointed to their outerends, to alternately grip or impin ge upon its inner periphery, as thesaid arms with their shoes are operated to impart theL requisite rotarymovement to said casing. The levers D are each suitably supported inposition by a spring, H, connected to a standard, G, one being securedyto the shaft, collar, lor box C and the other to the lever, whereby,also, as the 5o 4strap J, which is fastened to and carried nearly aroundsaid casing and connected to the treadle K, is pulled downward oruncoiled from said K casing by exerting downward pressure upon thefoot-piece E of said treadle, accordinglyv revolving in one directionsaid casing, said leversl will be caused to yield', and thus preventtheir shoes from resisting the action of ksaid casing in that directionof its movements. Immediately, however, upon'the removal of ysaid'pressure from the treadle (the casing in 6o practice being actedupon by the recoil of a spring, not here shown) the reflexing of thelevers under the action of their springs will `cause the thrusting andimpingement of their shoes upon the inner periphery of the casing 6 5and cause them to partake of the movement of the casing, which will ofnecessity be transand the possibility of the failure of engagement ofthe parts as is experienced in the jumping a tooth by the pawl with theuse of the latter mechanism, rendering the same unreliable. y

Having thus fully described my invention, 8o what I claim, and desire-to 'secure by Letters Patent, is-

c l. The combination ofthe cylindric casing A, shaft B, collar C, leverD, having shoes E, springs I-I, connecting-standards G, strap'J, 85 andtreadle K, substantially as shown, and for I the purpose described.

2. In a friction-clutch, the casing having the partially-coiled bandconnected to the treadle, said casing being secured upon the 9o shaft,in combination with the spring-levers carrying the shoes impinging uponthe casing, substantially as and for the purpose described.

In testimony whereof I affix my signature in presence of two witnesses.v

WILLIAM MAfrHnWs.-

Witnesses:

J. E. BROWN, Y C. O. REDMOND.

